The TSA can't arrest or detain anyone (let's hope this stays this way - http://www.popehat.com/2012/01/03/my-theory-of-tsa-arrest-po...); they have to call the police for that. And then, yes, the police could arrest or detain you for breaking the law.

Yeah, unfortunately this would be one of those civil disobediance acts that would get lumped in with yelling 'fire' in a crowded theatre. You'll probably lose on the grounds that your behavior presents a "clear and present danger to the United States". Seeing as there are plenty of idiots that believe in the security theatre, that is how your behavior would likely be interpreted.

I don't know. Going in the out door in any major airport is a huge expense. Talking someone into doing that for a few hundred dollars does not seem that difficult, or traceable.

I thought the TSA has no arrest powers... ?

They don't need arrest powers. They have the phone number for the FBI.

Right. So the TSA won't arrest you. They'll call someone else in to arrest you.